body {
  font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

$--color-primary: #000;
$--color-white: #fff;
$--button-hover-tint-percent: 0.3;
$--button-active-shade-percent: 0.4;
$--color-black: #000;
$--color-text-regular: #606266;
$--font-size-base: 12px; 

a {
  color: $--color-primary;
  text-decoration: none;

  &:hover,
  &:focus {
    color: rgba($color: $--color-primary, $alpha: $--button-hover-tint-percent);
  }
}

h1, h2, h3, h4, h5, h6 {
  color: $--color-text-regular;
  font-weight: inherit;

  &:first-child {
    margin-top: 0;
  }

  &:last-child {
    margin-bottom: 0;
  }
}

h1 {
  font-size: #{$--font-size-base + 6px};
}

h2 {
  font-size: #{$--font-size-base + 4px};
}

h3 {
  font-size: #{$--font-size-base + 2px};
}

h4, h5, h6, p {
  font-size: inherit;
}

p {
  line-height: 1.8;

  &:first-child {
    margin-top: 0;
  }

  &:last-child {
    margin-bottom: 0;
  }
}

sup, sub {
  font-size: #{$--font-size-base - 1px};
}

small {
  font-size: #{$--font-size-base - 2px};
}

hr {
  margin-top: 20px;
  margin-bottom: 20px;
  border: 0;
  border-top: 1px solid #eeeeee;
}
*:focus{
  outline: none;
}